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Temporal range: Late Cretaceous
Plesiotylosaurus Los Angeles.jpg
Mount in Los Angeles
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Order: Squamata
Family: Mosasauridae
Subfamily: Mosasaurinae
Genus: Plesiotylosaurus
Camp, 1942
  • P. crassidens Camp, 1942 (type)

Plesiotylosaurus is a genus of mosasaur from the Maastrichtian stage of the Late Cretaceous of North America.


  • Dinosaurs and Other Mesozoic Reptiles of California by Richard P. Hilton, Kevin Padian, and Ken Kirkland (page 30)
  • Ancient Marine Reptiles by Jack M. Callaway and Elizabeth L. Nicholls (page 286)
  • The Osteology of the Reptiles by Alfred Sherwood Romer (page 562)